var fs = require("fs");
var data = "";

// 创建可读流
var readerStream = fs.createReadStream("input.txt");

// 设置编码为 utf8
readerStream.setEncoding("UTF8");

// 处理流事件 --> data, end, error
readerStream.on("data", function(chunk){
	data += chunk;
});

readerStream.on("end", function(){
	console.log(data);
});

readerStream.on("error", function(err){
	console.log(err.stack);
});

console.log("程序结束");
